omniauth OAuth2 handshake for Fitbit

Author: codebender

README.md

@@ -1,2 +1,24 @@
-# omniauth-fitbit-oauth2
-OmniAuth OAuth2 strategy for Fitbit
+# OmniAuth OAuth2 strategy for Fitbit
+This gem is an OAuth2 OmniAuth Strategy for the [Fitbit API](https://wiki.fitbit.com/display/API/OAuth+2.0).
+
+## Installing
+
+Add to your `Gemfile`:
+
+```ruby
+gem 'omniauth-fitbit-oauth2'
+```
+
+Then `bundle install`.
+
+## Usage
+
+`OmniAuth::Strategies::FitbitOauth2` is simply a Rack middleware. Read [the OmniAuth 2.0 docs](https://github.com/intridea/omniauth-oauth2) for detailed instructions.
+
+Here's a quick example, adding the middleware to a Rails app in `config/initializers/omniauth.rb`:
+
+```ruby
+Rails.application.config.middleware.use OmniAuth::Builder do
+  provider :fitbit_oauth2, ENV['FITBIT_CLIENT_ID'], ENV['FITBIT_CLIENT_SECRET']
+end
+```

lib/omniauth-fitbit-oauth2.rb

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+require 'omniauth-fitbit-oauth2/version'
+require 'omniauth/strategies/fitbit_oauth2'

lib/omniauth-fitbit-oauth2/version.rb

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+module OmniAuth
+  module FitbitOauth2
+    VERSION = '0.0.1'
+  end
+end

lib/omniauth/strategies/fitbit_oauth2.rb

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+require 'omniauth-oauth2'
+require 'base64'
+
+module OmniAuth
+  module Strategies
+    class FitbitOauth2 < OmniAuth::Strategies::OAuth2
+      option :name, 'fitbit_oauth2'
+
+      option :client_options,
+        {
+          :site           => 'https://api.fitbit.com',
+          :authorize_url  => 'https://www.fitbit.com/oauth2/authorize',
+          :token_url      => 'https://api.fitbit.com/oauth2/token'
+        }
+
+      option :authorize_options, [:scope, :response_type]
+      option :response_type, 'code'
+
+      def build_access_token
+        options.token_params.merge!(:headers =>
+          {'Authorization' => basic_auth_header})
+        super
+      end
+
+      def basic_auth_header
+        'Basic ' + Base64.encode64(options[:client_id] + ':' +
+          options[:client_secret]).gsub("\n", '')
+      end
+
+      uid do
+        raw_info['user']['encodedId']
+      end
+
+      info do
+        {
+          :name         => raw_info['user']['displayName'],
+          :full_name    => raw_info['user']['fullName'],
+          :display_name => raw_info['user']['displayName'],
+          :nickname     => raw_info['user']['nickname'],
+          :gender       => raw_info['user']['gender'],
+          :about_me     => raw_info['user']['aboutMe'],
+          :city         => raw_info['user']['city'],
+          :state        => raw_info['user']['state'],
+          :country      => raw_info['user']['country'],
+          :dob          => !raw_info['user']['dateOfBirth'].empty? ? Date.strptime(raw_info['user']['dateOfBirth'], '%Y-%m-%d'):nil,
+          :member_since => Date.strptime(raw_info['user']['memberSince'], '%Y-%m-%d'),
+          :locale       => raw_info['user']['locale'],
+          :timezone     => raw_info['user']['timezone']
+        }
+      end
+
+      extra do
+        {
+          :raw_info => raw_info
+        }
+      end
+
+      def raw_info
+        if options[:use_english_measure] == 'true'
+          @raw_info ||= MultiJson.load(access_token.
+            request('get', 'https://api.fitbit.com/1/user/-/profile.json',
+              { 'Accept-Language' => 'en_US' }).body)
+        else
+          @raw_info ||= MultiJson.load(access_token.
+            get('https://api.fitbit.com/1/user/-/profile.json').body)
+        end
+      end
+    end
+  end
+end

spec/omniauth/strategies/fitbit_oauth2_spec.rb

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+require 'spec_helper'
+
+describe "OmniAuth::Strategies::FitbitOauth2" do
+  subject do
+    OmniAuth::Strategies::FitbitOauth2.new(nil, @options || {})
+  end
+
+  context 'client options' do
+    it 'has correct API site' do
+      expect(subject.options.client_options.site).
+        to eq('https://api.fitbit.com')
+    end
+
+    it 'has correct token url' do
+      expect(subject.options.client_options.token_url).
+        to eq('https://api.fitbit.com/oauth2/token')
+    end
+
+    it 'has correct authorize url' do
+      expect(subject.options.client_options.authorize_url).
+        to  eq('https://www.fitbit.com/oauth2/authorize')
+    end
+  end
+end

spec/spec_helper.rb

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+require 'bundler/setup'
+Bundler.setup
+
+require 'omniauth-fitbit-oauth2'